Writing instrument



FIG. 1 is a front elevational view of the writing instrument accordingto the present invention;

FIG. 2 is a left side elevational view of the writing instrument, theright side being a mirror image of the right side;

FIG. 3 is a rear elevational view of the writing instrument;

FIG. 4 is a bottom plan view of the writing instrument; and,

FIG. 5 is a top plan view of the writing instrument.

The ornamental design for a writing instrument, as shown and described.